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OSBM Bolt 
OSBM Bolt in culvert, SE side of road, 148' NE from junction of hedges.
Location
Grid reference: SN 6479 8822.
Landranger 135: Aberystwyth & Machynlleth.
Structure: Unknown.
Waypoint: OS0318.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Aberystwyth,
11.64km to the south.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Aberystwyth to Machynlleth levelling line. The surveyor's description was OSBM Bolt in culvert, SE side of road, 148' NE from junction of hedges.
Location
Grid reference: SN 6479 8822.
Landranger 135: Aberystwyth & Machynlleth.
Structure: Unknown.
Waypoint: OS0318.
Neighbouring Flush Brackets
| S0460 | Tal-y-bont 1.47km to the northeast. |
| G2010 | Rhydypennau 3.04km to the southwest. |
| S0467 | Bow Street, School 4.25km to the southwest. |
| G2011 | Tre'r-ddôl 4.32km to the north. |
| G2088 | Bow Street, Newlynne 4.33km to the southwest. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Aberystwyth to Machynlleth levelling line. The surveyor's description was OSBM Bolt in culvert, SE side of road, 148' NE from junction of hedges.
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